Which is not a function of cell membrane proteins?

contain marker molecules to recognize self cells

to act as the skeleton of the cell

serve as ion channels

act as carrier proteins

Answer and Explanation

The Correct Answer is B

A. contain marker molecules to recognize self cells: Glycoproteins serve as cell identity markers to help the immune system distinguish “self” from “non-self.”
B. to act as the skeleton of the cell: The cytoskeleton, not membrane proteins, acts as the structural support inside the cell.
C. serve as ion channels: Membrane proteins act as channels to allow specific ions to pass through the membrane.
D. act as carrier proteins: Carrier proteins help transport substances across the membrane, often against a concentration gradient.

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Correct Answer is D

Explanation

A. triglycerides: Triglycerides are stored in fat cells, not a major component of membranes.
B. eicosanoids: These are signaling molecules, not structural components of the plasma membrane.
C. steroids: While cholesterol (a steroid) is present in membranes, it's not the most abundant.
D. phospholipids: The plasma membrane is primarily made of a phospholipid bilayer, forming the main structural framework.

A. anterior to her shoulders B. posterior to her shoulders C. inferior to her shoulders D. superior to her shoulders

Correct Answer is D

Explanation

A. anterior to her shoulders: Anterior means in front of the body. During a pole vault, Stacy’s hips are typically above her shoulders, not in front.
B. posterior to her shoulders: Posterior means behind the body. Her hips are not necessarily behind her shoulders in the motion.
C. inferior to her shoulders: Inferior means below. Her hips are elevated higher than her shoulders mid-vault.
D. superior to her shoulders: Superior means above. In the airborne phase of a pole vault, Stacy’s hips are above her shoulders, making them superior in position.

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Which is not a function of cell membrane proteins?

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Naxlex Comprehensive Predictor Exams

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Explanation

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Explanation

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